Fatal error: Uncaught Error: Class "Symfony\Component\Notifier\Exception\LogicException" not found in /home/pataplou/www/patrick/pataplouf/vendor/symfony/notifier/Exception/FlashMessageImportanceMapperException.php:17 Stack trace: #0 {main} thrown in /home/pataplou/www/patrick/pataplouf/vendor/symfony/notifier/Exception/FlashMessageImportanceMapperException.php on line 17